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通过脉冲电子顺磁共振研究光系统II中Q(A)和Chl(Z)相对于酪氨酸Y(Z)和Y(D)的位置

Positions of Q(A)and Chl(Z)Relative to Tyrosine Y(Z)and Y(D)in Photosystem II Studied by Pulsed EPR.

作者信息

Kawamori A, Katsuta N, Mino H, Ishii A, Minagawa J, Ono T-A

机构信息

Faculty of Science, Kwansei Gakuin University, Gakuen 2-1, Sanda, 669-1337 Japan.

出版信息

J Biol Phys. 2002 Sep;28(3):413-26. doi: 10.1023/A:1020312621949.

DOI:10.1023/A:1020312621949
PMID:23345785
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3456750/
Abstract

PELDOR (Pulsed Electron eLectron DOuble Resonance) was applied to determinethe distance of between Y(Z)and Q(A) (-)inY(D)-less mutant of Chlamydomonas reinhardtiiin Tris-treatedand Zn-substituted preparation of photosystem II. The value of distance wasfound to be 34.5 ± 1 Â. A '2+1' electron spin echo method has beenapplied to measure the orientation of the radius-vector RfomY(D)to Chl(Z)in a membrane-oriented photosystem II. The anglebetween Rand the membrane normal nwas determined to be 50 ±5(°), using the distance 29.4 ± 0.5 Â determined in non-orientedPS II.

摘要

脉冲电子双共振（PELDOR）被用于测定莱茵衣藻Y（D）缺失突变体在经Tris处理和锌取代的光系统II制剂中Y（Z）和Q（A）（-）之间的距离。发现该距离值为34.5±1埃。一种“2 + 1”电子自旋回波方法已被用于测量在膜定向的光系统II中从Y（D）到Chl（Z）的半径向量R的方向。利用在非定向光系统II中测定的29.4±0.5埃的距离，确定R与膜法线n之间的夹角为50±5（°）。

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